# US 11,451,122 B2 · Method for manufacturing laminated iron core product

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- Number: US 11,451,122 B2
- Document ID: US11451122B2
- Status: Granted
- Kind: B2
- Application number: 16/674,430
- Filed: 2019-11-05
- Published: 2020-06-04
- Granted: 2022-09-20
- Earliest claimed: 2018-11-30
- Assignees: Mitsui High-Tec, Inc.
- Applicants: Mitsui High-Tec, Inc.
- Inventors: Jin Oda; Akinori Mizuno; Yuichi Shiraishi
- Web page: https://patentgrep.com/patent/US11451122B2

## CPC

- H02K 15/03: having permanent magnets
- H02K 1/276: Magnets embedded in the magnetic core, e.g. interior permanent magnets [IPM]
- H02K 1/28: Means for mounting or fastening rotating magnetic parts on to, or to, the rotor structures
- H02K 15/12: Impregnating, moulding insulation, heating or drying of windings, stators, rotors or machines
- B08B 5/02: Cleaning by the force of jets, e.g. blowing-out cavities {(airguns or nozzles per se B05B1/005)}
- B08B 7/0071: {by heating (B08B7/0035 takes precedence)}
- B21D 28/02: Punching blanks or articles with or without obtaining scrap (cutting nails or pins from strips or sheet material B21G3/26); Notching
- Y10T 29/49012: Rotor
- H02K: DYNAMO-ELECTRIC MACHINES (dynamo-electric relays H01H53/00; conversion of DC or AC input power into surge output power {H03K3/53})
- B08B: CLEANING IN GENERAL; PREVENTION OF FOULING IN GENERAL
- B21D: WORKING OR PROCESSING OF SHEET METAL OR METAL TUBES, RODS OR PROFILES WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL (working or processing of wire B21F)
- Y10T: TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION

## Abstract

A method for manufacturing a laminated iron core product includes laminating a plurality of iron core members which are punched from a first metal plate to form a laminate, removing oil adhering to the laminate, removing oil adhering to an end surface plate which is punched from a second metal plate, and disposing the end surface plate on an end surface of the laminate and welding the end surface plate and the laminate.

## Claims

### Claim 1

A method for manufacturing a laminated iron core product, the method comprising:
laminating a plurality of iron core members which are punched from a first metal plate to form a laminate;
removing oil adhering to the laminate;
laminating a plurality of end surface plates which are punched from a second metal plate to form a temporary laminate;
removing oil adhering to an end surface plate which is punched from the second metal plate; and
disposing the end surface plate on an end surface of the laminate and welding the end surface plate and the laminate, wherein
removing the oil adhering to the end surface plate includes delaminating one end surface plate of the plurality of end surface plates from the temporary laminate and removing oil adhering to the one end surface plate.

### Claim 2 (depends on 1)

The method for manufacturing the laminated iron core product according to claim 1, wherein removing the oil adhering to the end surface plate includes blowing gas onto the end surface plate to blow off the oil from the end surface plate.

### Claim 3 (depends on 1)

The method for manufacturing the laminated iron core product according to claim 1, wherein removing the oil adhering to the laminate includes evaporating the oil from the laminate by subjecting the laminate to a heat treatment.

### Claim 4 (depends on 1)

The method for manufacturing the laminated iron core product according to claim 1, wherein removing the oil adhering to the laminate includes blowing gas onto the laminate to blow off the oil from the laminate.